Metal-Rich Halides as Precursors for Solution Cluster Chemistry and the Exploitation of Ionic Liquids as Solvent

德克萨斯农工大学化学系Timothy Hughbank博士得到化学部无机、生物无机和有机金属计划的支持，主要研究含有金属-金属键的聚合物和簇合物的溶液化学，以及作为簇合物结晶介质的离子液体的溶液化学。已知以固态存在的第3、4族和稀土团簇将使用咪唑/三氯化铝混合物被提取到溶液中，该混合物在室温下为液体。溶液介质将允许这些团簇被表征为分子物种，并以比纯固态相更可控、更合理的方式进行操作。该项目最初将集中于一系列锆基系统，并将开发这些系统作为扩展簇和聚合物的前体。随着项目的进展，将对使用离子液体作为制备和结晶各种簇合物的溶剂进行系统的调查。该项目旨在设计一种新的方法来制备和操纵由金属原子组成的聚合物。虽然这种金属物种已知以固态存在，但合成并不简单，例如，通常不可能将这些簇状和聚合物用作更复杂的聚合物或簇状的起始原料。一种新的“离子”溶剂系统已经被设计出来，这将被用来从固体中溶解材料。通过在溶液中获得它们，将有可能对它们进行表征，并利用它们来重复形成目前未知的新材料。

Dr. Timothy Hughbanks, Department of Chemistry, Texas A & M University, is supported by the Inorganic, Bioinorganic, and Organometallic Program of the Chemistry Division for an investigation of the solution chemistry of polymers and clusters containing metal-metal bonds and of ionic liquids as media for the crystallization of cluster based compounds. Group 3, 4, and lanthanide clusters, which are known to exist in the solid state, will be extracted into solution using an imidizolium/aluminum trichloride mixture, which is liquid at room temperature. The solution medium will permit these clusters to be characterized as molecular species and to be manipulated in a more controlled, rational fashion than is possible with purely solid state phases. The project will initially concentrate on a series of zirconium based systems and will develop these as precursors to extended clusters and polymers. As the project progresses, a systematic investigation will be carried out on the use of ionic liquids as solvents for the preparation and crystallization of a variety of cluster compounds. This project aims at devising a new method of preparing and manipulating polymers composed of metal atoms. While such metal species are known to exist in the solid state, the syntheses are not simple and it is often impossible to use these cluster and polymeric substances as, for example, starting materials for more complex polymers or clusters. A new 'ionic' solvent system has been devised and this will be used to dissolve the materials from the solid. By obtaining them in solution, it will be possible to both characterize them and utilize them to reproducibly form new, presently unknown materials.